larryw@dasys1.UUCP (Winston Lawrence) (08/24/88)
s my understanding that the old 800 has 8K of RAM which is somehow >switched out when a cartridge (esp. the BASIC cartridge) is installed. >Is there any way to get temporary access to that RAM while the cartridge >is plugged in? I don't have my manuals in front of me, but basically the answer is no. The standard 800 has four slots one, the slot closest to the back of the ram carts to be inserted, giving the 800 its 48k ram complement. of the address space unused (and unuseable by Atari hardware anyway.) would go), disabled RAM from A000 to BFFF if I remember correctly. The right cartridge slot (if used) disabled ram from 8000 to 9FFF. that the rom cartridges could use this address space. Apple I believe and then for the Atari 800 to allow bank selection. A 16k page from 6000-7FFF I think was bank selectable by writing program wrote this number anywhere in the C000-CFFF range (which Anyway 8 pages times 16k per page gave the old 800 128K of additional switching technique was later used by the xe/xl line to allow a the switch has changed to an address that used to be one of the Axlon technique do not work on the XL/XE, and programs which work (for the Atari) and its a shame that Atari took a different (and company producing an excellent product, when I ran into problems listings for the 'hooks' that they put into DOS 2.0 and the code that solved all of the problems that I had encountered. -- Winston Lawrence {allegra,philabs,cmcl2}!phri\ Big Electric Cat Public Unix {bellcore,cmcl2}!cucard!dasys1!larryw New York, NY, USA {sun}!hoptoad/